:root {
  --navy: #16324f;
  --navy-dark: #0e2338;
  --green: #2e8b57;
  --yellow: #ffd54f;
  --bg: #ffffff;
  --bg-alt: #f4f7f9;
  --text: #263238;
  --muted: #607d8b;
  --border: #e0e6ea;
  --header-h: 64px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}

img {
  max-width: 100%;
}

/* --- ヘッダー --- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: box-shadow 0.2s ease;
}

.site-header.scrolled {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 20px;
}

.logo {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--navy);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.logo span {
  color: var(--green);
}

.global-nav {
  margin-left: auto;
}

.global-nav ul {
  display: flex;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.global-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
}

.global-nav a:hover {
  color: var(--green);
}

.cta-btn {
  display: inline-block;
  background: var(--green);
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  border: none;
  border-radius: 999px;
  padding: 10px 24px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: filter 0.15s ease, transform 0.15s ease;
}

.cta-btn:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.cta-btn.wide {
  width: 100%;
  padding: 14px;
  font-size: 1.05rem;
}

.header-cta {
  padding: 8px 20px;
  font-size: 0.88rem;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--navy);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* --- ヒーロー --- */

.hero {
  background:
    radial-gradient(ellipse at 80% 20%, rgba(46, 139, 87, 0.35), transparent 55%),
    linear-gradient(150deg, var(--navy) 30%, var(--navy-dark));
  color: #fff;
  padding: calc(var(--header-h) + 80px) 20px 100px;
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.hero-eyebrow {
  color: var(--yellow);
  font-weight: bold;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
  font-size: 0.95rem;
}

.hero-title {
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  line-height: 1.35;
  margin: 0 0 20px;
  font-weight: 800;
}

.hero-lead {
  font-size: 1.05rem;
  opacity: 0.9;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.ghost-btn {
  display: inline-block;
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  padding: 10px 24px;
  font-size: 0.95rem;
  transition: background 0.15s ease;
}

.ghost-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* --- セクション共通 --- */

.section {
  padding: 80px 20px;
}

.section.alt {
  background: var(--bg-alt);
}

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.section-inner.narrow {
  max-width: 720px;
}

.section-title {
  font-size: 1.7rem;
  margin: 0 0 28px;
  color: var(--navy);
}

.section-title .en {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--green);
  margin-bottom: 4px;
}

.section-title.light {
  color: #fff;
}

.section-lead {
  margin: 0 0 36px;
  font-size: 1rem;
}

/* スクロールで浮き上がる演出 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* --- コンセプト --- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-alt);
  border-radius: 12px;
  padding: 28px 22px;
  text-align: center;
}

.feature-icon {
  font-size: 2.2rem;
}

.feature-card h3 {
  margin: 12px 0 8px;
  color: var(--navy);
  font-size: 1.1rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

/* --- レッスン --- */

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.lesson-card {
  background: #fff;
  border: 1px solid var(--border);
  border-top: 4px solid var(--green);
  border-radius: 10px;
  padding: 24px 20px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.lesson-card.online {
  border-top-color: var(--navy);
}

.lesson-tag {
  display: inline-block;
  background: var(--bg-alt);
  color: var(--green);
  font-size: 0.75rem;
  font-weight: bold;
  border-radius: 4px;
  padding: 3px 10px;
}

.lesson-card.online .lesson-tag {
  color: var(--navy);
}

.lesson-card h3 {
  margin: 12px 0 8px;
  font-size: 1.1rem;
  color: var(--navy);
}

.lesson-card > p {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 12px;
}

.lesson-points {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.86rem;
}

.lesson-points li {
  padding: 4px 0 4px 1.4em;
  position: relative;
}

.lesson-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: bold;
}

/* --- 受講の流れ --- */

.flow-list {
  counter-reset: flow;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 20px;
}

.flow-list li {
  counter-increment: flow;
  background: var(--bg-alt);
  border-radius: 10px;
  padding: 24px 20px 20px;
  position: relative;
}

.flow-list li::before {
  content: "0" counter(flow);
  position: absolute;
  top: -14px;
  left: 16px;
  background: var(--green);
  color: #fff;
  font-weight: bold;
  font-size: 0.85rem;
  border-radius: 999px;
  padding: 3px 12px;
}

.flow-list h3 {
  margin: 6px 0 8px;
  font-size: 1.02rem;
  color: var(--navy);
}

.flow-list p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
}

/* --- 料金 --- */

.price-note {
  font-size: 0.82rem;
  color: var(--muted);
  margin: -12px 0 24px;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.price-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 20px;
  text-align: center;
  position: relative;
}

.price-card.featured {
  border: 2px solid var(--green);
}

.price-card .badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--yellow);
  color: #333;
  font-size: 0.75rem;
  font-weight: bold;
  border-radius: 999px;
  padding: 2px 14px;
}

.price-card h3 {
  margin: 0 0 8px;
  color: var(--navy);
  font-size: 1.05rem;
}

.price {
  margin: 0 0 10px;
  color: var(--muted);
}

.price span {
  font-size: 2rem;
  font-weight: 800;
  color: var(--green);
}

.price-desc {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* --- FAQ --- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 16px 18px;
  font-weight: bold;
  list-style: none;
  position: relative;
  padding-right: 40px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "＋";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--green);
  font-weight: bold;
}

.faq-item[open] summary::after {
  content: "－";
}

.faq-item p {
  margin: 0;
  padding: 0 18px 16px;
  font-size: 0.92rem;
  color: var(--muted);
}

/* --- お問い合わせ --- */

.section.contact {
  background: linear-gradient(150deg, var(--navy) 30%, var(--navy-dark));
  color: #fff;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: bold;
}

.required {
  display: inline;
  background: #e57373;
  color: #fff;
  font-size: 0.7rem;
  border-radius: 3px;
  padding: 1px 6px;
  margin-left: 6px;
  font-weight: normal;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  border: none;
  border-radius: 6px;
  padding: 12px;
  font-size: 1rem;
  font-family: inherit;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 3px solid var(--yellow);
}

.form-error {
  color: #ffcdd2;
  font-size: 0.88rem;
  min-height: 1.2em;
  margin: 0;
}

.form-done {
  text-align: center;
  font-weight: bold;
  margin-top: 16px;
}

.hidden {
  display: none;
}

/* --- フッター --- */

.site-footer {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  padding: 36px 20px;
  font-size: 0.85rem;
}

.site-footer .logo {
  color: #fff;
  font-size: 1rem;
}

.footer-note a {
  color: var(--yellow);
}

.copyright {
  opacity: 0.6;
  margin-bottom: 0;
}

/* --- モバイル --- */

@media (max-width: 800px) {
  .menu-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .global-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.25s ease;
  }

  .global-nav.open {
    transform: none;
  }

  .global-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
  }

  .global-nav a {
    display: block;
    padding: 14px 24px;
  }

  .menu-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .section {
    padding: 56px 20px;
  }
}